Hose.



E. T. GREENFIELD. HOSE.

APPLIOATION FILED MAY 2, 1908.

1,001 ,842. Patented Aug. 29, 1911.

' 2 SHEETS-SHEET 1.

E. T. GREBNPIELD.

HOSE.

APPLICATION FILED MAY 2, 1908. I 1,001,842 Patented Aug. 29, 1911.

Z SHEE'1SSHEET 2.

WITNESS:

ATTORNEY siding at Kiamesha, in the county of Sulli EDWIN T. GBEENFIELD,0F KIAMESHA, NEW YORK.

HOSE.

Specification of Letters Patent. Patented Aug. 29, 1911.

Application filed May 2, 1908. Serial No. 430,493.

To all whom ifs-concern:

Be it known that I, EDWIN T. GREEN- FIELD, a citizen of the UnitedStates, re-

van and State of New York, have invented certain new and usefulImprovements in Hose, of which the following is a specification.

This invention relates to flexible metallic hose adapted for such usesas carrying steam and air under pressure.

While the hose constructed in accordance with the-invention issusceptible of use in various ways, it is of particular utility inmaking connection between the steam andair pipes of the cars of arailway train. For this purpose, the hose must possess suflicientstrength to withstand considerable pressure and yet it must be readilyflexible to allow for the relative movements of the cars.

The preferred embodiment of the invention is illustrated in theaccompanying drawings in which 1 Figure 1 is a view of the hose partlyin section and partlyin elevation, Fig. 2 is an enlarged section of apiece of the hose, Figs. 3 and 4 are sectional views showin the hose inprocess of construction, and Flgs. 5 and 6 are a sectional elevation andan end view, respectively, illustrating a modification.

Referring to these drawings, the hose consists of a plurality of tubularpieces, each of which has one end extending within the end of the nextadjacent piece and movable relatively to but interlocked with thatpiece. Each of the tubular pieces has a portion 1 at one end which is oflarger diameter than the portion 2 at the other end, the two parts ofdifferent diameters being connected by T a wall 3 disposed transverselyto the axis of the tubular piece. In the portion 2 of smaller diameteris a shallow circumferential groove 4 formed by shaping the metal of theportion 2 to extend in a direction transverse to the axis of the pieceto form the side walls of the groove at 5 and 6.

50, The portion 1 is convexly curved as shown,

the center about which the curve is described being in the axis of thetubular piece.

The smaller portion 2 of each tubular piece fits within the largerportion 1 of the next adjacent piece and between these two is a gasket 7of any suitable compressible material and on either side thereof, a ring8 of thin sheet-metal. The thickness of the gasket and the two rings 8is the same as the width of the groove in the portion 2 so that thewalls 5 and 6 retain the gasket and rings in proper relative position.The rings 8 are of such size and their outer edges are so shaped thatthey fit snugly between the portions 1 and 2 of adjacent pieces and,with the gasket 7, eifectually prevent the escape of the fluid carriedby .the hose even though the fluid be under considerable pressure.

In the manufacture of the hose, the tubular pieces may be shaped asabove described except that the curve of the portion 1 is but halfformed. A pair of pieces are then assembled with the gasket 7 and rings8 between them, as shown in Fig. 3, and then the end of the portion 1 iscurved over to partially inclose the gasket and rings and complete theconvex curvature of-the portion 1. The ends of a length of the hose maybe finished ofi in any suitable manner, depending on the use to whichthe hose is to be put. Thus in Fig. 1, I have shown end-pieces 9 and 10,each having one end formed to correspond with one end of the tubularpieces and the other threaded or otherwise'formed to coact with the partto which the hose is to be attached. A methodof constructing the hosewhich I prefer to employ, however, involves expanding the underlappingend of each tubular piece when it and the next adjacent piece are inproper position, the curvature of the overlapping ends being completedin making the pieces as the curve can then be more accurately formed.Thus in Fig. 4 the underlapping end 2 of a piece is shown as tapered sothat it may be inserted within the overlapping end 1 of the next" piece.In this case the rings 8 of the gasket may be split to permit of readilyinserting them within the end 1. With the parts assembled as shown inFig. 4, a suitable tool is insertedwithin the contracted end 2 and thatend is expanded until the gasket is properly seated in its groove 4 andcompletely fills,

by the hose. The flexure is obtained by the movement of each piecerelatively to the pieces adjacent thereto, each gasket 7 sliding on theunder surface of the convex portion 1 overlying it. The gasket 7 isretained in position by the walls 5 and 6, it being practically rivetedupon the portion 2and the rings at the sides thereof retain the gasketin proper position by preventing it from flattening out; in fact, thepressure upon the inner ring 8 tends to expand the gasket in a radialdirection so as to press it into contact with the curved surface of thetubular piece so that the space between the two pieces is completelyfilled and the gasket, while sliding on the curved surface, effectuallyprevents leakage.

In Figs. 5 and 6, a slight modification is shown in which each'unit ofthe flexible hose consists of three parts 11, 12 and 13 which aresecured together and which may be castings. The parts ll and 12 arethreaded for convenience in securing them together and each is providedwith flattened walls 14 and 15 so that they may be gripped withwrenches. The curved portion for the joint between two members is formedhalf in the part 12 and half in the part 13 and these parts havethreaded en agement as shown. The part 13 is provider? with integralprojections 16 so that it maybe gripped with a wrench in securing theparts together. In assembling the hose, the end of the part 11 with thegasket thereon is inserted in the enlarged endpf a part 12 and a part 13is then passed over the part 11 and screwed up on the part 12 until itengages the gasket firmly. As in the construction above described, thegasket consists of three parts, a compressible part, as of asbestos,vulcabeston, or other similar material, and on either side thereof, a'non-compressible ring. Also, in this construction, the pressure on theinner ring of the gasket tends to force it in a direction to expand thecompressible gasket to more completely fill the space be tween theadjacent parts and thus more effectually prevent leakage.

Having described my invention, what I claim as new therein and desire tosecureby Letters Patent of the United States is:

l. A joint consisting of two tubular metallic members interlocked toprevent separation thereof, one having one end thereof convexly curved,said end being formed in two parts, which are detachablysecuredtogether, two shoulders formed on the end of the other member, a gasketon said second inember lying between and positioned by said shoulders,said gasket consisting of a ring of compressible material and a metallicring on either side thereof, said metallic rings being movable with saidgasket.

and said gasket being adapted to slide upon the interior surface of saidconvexly curved portion, substantially as set forth.

2. A joint consisting oftwo tubular metallic members interlocked toprevent separation thereof, one having one end thereof convexly curved,two shoulders formed on the end of the other member, and a gasket onsaid second member lying between and positioned by said shoulders, saidgasket consisting of a ring of compressible material and a metallic ringon each side thereof, said metallic rings being movable with said gasketand said gasket being adapted to slide upon the interior surface of saidconvexly curved portion, substantially as set forth.

This specification signed and witnessed this 27th day of A ril,1908.

EDWI T. GREENFIELD. Witnesses:

D. S. EDMoNns, I. BARTLETI.

